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Bradley Cooper, People's alleged Sexiest Man Alive, was spotted out by his lonesome on Thanksgiving in the West Village.

Oksana Grigorieva got in the Thanksgiving spirit yesterday in L.A. -- handing out food at the same homeless shelter where Kim Kardashian and Jennifer Love Hewitt cooked up a real mess.

With the NBA lockout in full effect, Chicago Bulls star Joakim Noah cooled off his jacked up muscles in the warm waters of Miami Beach on Saturday.

When life gives you lemons ... make some waves.

It's been nearly 2 years since that fateful day when Tiger Woods crashed his Escalade into a tree in Florida and dozens of mistresses fell out ... including Rachel Uchitel, who marked the occasion at the Villa del Palmar hotel in Mexico this weekend by stripping down to a bikini.

Uchitel's life was forever changed by the November 27 incident -- she made AND LOST millions of dollars -- but she's since moved on and recently married a younger dude named Matt Hahn.

Denise Richards and ex-husband Charlie Sheen made nice and enjoyed some quality time with their kids at eldest daughter Sam's soccer game in Calabasas this weekend.

Mel Gibson continued his platonic relationship with actress Azita Ghanizada, showing up at her birthday party in Los Angeles this week.

Mila Kunis became the latest celeb to accompany a Marine to the Marine Corps Ball ... hitting up the event in Greenville, NC with Marine Sgt. Scott Moore.

As the re-opening of the Natalie Wood death investigation made headlines, Christopher Walken was on the set of his latest project, "Seven Psychopaths."

How did Ashton Kutcher handle Demi Moore's divorce announcement? By knocking out another episode of "Two and a Half Men."

Just a few hours after the news broke Demi wants out of their marriage ... Ashton was spotted on the Warner Bros. lot where the show is taped.

Lady Gaga emerged from a London hotel on Wednesday wearing what appeared to be a hot pink sperm hat on her head.

She likes wearing protection.

Looking like retired snowbirds, Aerosmith members Joe Perry (left) and Steven Tyler (right) showed off their sixtysomething rock-n-roll bods and posed for a shirtless pic while at the beach in Maui on Tuesday.

Britney Spears went green in Rio by showing off all her environmentally sound bits in a bright emerald two-piece bathing suit on Tuesday.

The 29-year-old mother of two is doing her part to make the world a better place.

Leonardo DiCaprio may have reason to hide ... because the environmentalist wasn't very green as he arrived in Sydney Monday ... on a private jet.

In the past, Leo's camp has claimed the 37-year-old "J.Edgar" star occasionally flies private when he has to get to remote locations.

Sydney may have kangaroos, but it's not remotely remote.

A source close to Leo tells TMZ ... he simply hitched a ride with a plane that was already headed to Australia.

After having to cancel shows in Sweden for the flu and exhaustion in the last couple of weeks, Rihanna was back to her healthy and gorgeous self in shades, a fur vest, shorts and sexy garters in England this weekend.

The 23-year-old resumed her European tour with a couple of nights at London's O2 Arena.

Kendall Jenner emerged from her sweet 16 dinner last night (with sister Kim among the guests) to find her present -- a brand new, bow-tie wrapped Range Rover -- waiting for her outside.

Must be nice.

Vanessa Williams and Kim Kardashian were at the Atlanta airport early this morning, hopping a flight back to Los Angeles after shooting scenes for Tyler Perry's movie, "The Marriage Counselor."

Vanessa and Kim make a fun pairing ... both had to overcome sex scandals early in their careers before they rose to superstardom.